The Universe — Beyond The Big Bang — History.com Videos
That a theory - or more like a law, or set of laws - needs no explanation is counterintuitive but also strangely liberating.
When I learn something, my instinct is to wrap my head around it - to get a feel for it from all angles, to compare and contrast it to other bits of knowledge, and to try to grasp the underlying principles that make it fit together. Perhaps that's just the normal response: we seek to understand things.
Newton's curious depiction of gravity, on the other hand, separates learning from understanding.
And beyond separating the two, it suggests that understanding might actually set you back. His theory was largely resisted for some time because it lacked an underlying explanation. Its utility and predictive power overcame this hurdle.
Following Einstein, the current consensus is that some laws of the universe are so distant from our scale of experience that we can't be expected to understand their mechanism, much less intuitively grasp them. There's an intuitive appeal in this explanation about how difficult it is to grasp very large and very small things. But that doesn't make it true.